Incandescent element.



Patented .Iuly I7, |900.

C. G. RICHARDSON.

INCANDESCENT ELEMENT.

(Application filed July 17, 1899.)

(No Model.)

@Mwah/v Mwummm UNITED STATES PATENT OFFICE.

CHARLES G. RICHARDSON, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO DILLIVYN WIS'IAR, OF PHILADELPHIA, PENNSYLVANIA.

INCANDESCENT ELEM ENT.

SPECIFICATION forming part of Letters Patent No. 653,696, dated July 1'7, 1900.

Application led July 17, 1899. Serial No. 724,332 (No specimens.)

To CLZ whom, it may concern:

Be it known that I, CHARLES G. RICHARD- SON, a subject of the Queen of Great Britain and Ireland, residing in the borough of Man- 5 hattan, city of New York, and State of New York, have invented certain new and useful Improvementsin the Art of Incandescent Gras` Lighting, of which the following is a specification.

1o This invention relates to improvements in incandescent elements. More particularly it relates to improvements on the subject-matter of my application filed in the United States Patent Oiice July 17,1899, Serial No. 724,184,

wherein au incandescent is described and claimed which is made by forming a 'tightlywound roll of a suitable impregnated fabric and burning out the fabric, resulting in a Very durable reticulated mass of incaudescizo ble oxids, which become incandescent when exposed to the flame of an oxyhydrogen or other suitable burner. In my said former application the roll was a solid disk; but it is the object of the present invention to produce a disk or cylinder with an axial perforation to facilitate attachment to a suitable support.

Referring to the drawings which accompany the specification to aid the description,

3o Figure 1 is a plan of a strip of suitable fabric. Fig. 2 is a perspective view of the finished element. Fig. 3 is an axial section of the same.

A suitable strip of saturated combustible fabric u, as shown in Fig. l, and which is preferably a cotton fabric similar to that used in the manufacture of incandescent gas-mantles, is rolled tightly around a tube b, of combustible material, as paper, or the fabric may be rolled around a solid rod, of combustible 4o material, as paper; Vbut I prefer to use a tube. One end of the strip a is first fastened to said tube or rod and then the whole strip gradually wound around, the layers being from time to time sewed through and through with i thread that is saturated with the same solution as the fabric, the sewing being so arranged, however, that the threads do not pass through the tube. Finally'the end of the strip is sewed down to the roll, and the roll is 5o now ready to be burned out by placing the end of a suitable support through the tube b and holding the roll over the flame from a Bunsen or other suitable burner. The strip is saturated, preferably before rolling, with the greatest possible quantity of hydroxds of the incandescible earth-minerals-such as hydroxids of thorium, zirconium, and others-as described in my said prior application. After burning out there results a cyl- 6o inder of oxids of the minerals perforated axially. In use the element is placed on a suitable holder which passes through the axial perforation and the flame plays on the periphery of the element, as in the case of the ordinary lime cylinder.

Now, having described my improvements, I claim as my invention- An element for incandescent gas-lighting consisting of a roll of combustible impreg- 7o nated fabric tight-wound around a tube also of combustible material, substantially as described.

CHARLES G. RICHARDSON.

W`itnesses: y BERNARD J. IsEcKE, HENRY V. BROWN. 

